Vehicle Diagnostic Port Signal Detection for Fast Protocol Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Determining the appropriate diagnostic protocol for a vehicle's diagnostic bus is time-consuming and can cause errors due to incompatibilities between different vehicle makes and models.
Innovation Solution
A method involving electrical contact with diagnostic port pins to monitor voltage or impedance behaviors, allowing quick identification of the diagnostic protocol, followed by an ordered protocol selection to ensure compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional methods of determining diagnostic protocol are used, then protocol compatibility can be achieved, but the process is time-consuming and reduces productivity
Solution Approach 1:
The system performs preliminary detection of voltage or impedance characteristics on diagnostic bus lines before initiating full diagnostic communication. By measuring electrical properties (voltage levels, impedance values) in advance, the system pre-determines the likely protocol type, allowing faster protocol selection and reducing the time required to establish diagnostic communication.
Solution Approach 2:
The patent replaces manual or trial-and-error protocol determination methods with an automated electrical measurement system. By using voltage or impedance measurements on the diagnostic bus lines, the system automatically identifies the protocol type without requiring technicians to manually test different protocols or rely on time-consuming lookup procedures.
2Adaptability or versatility
If multiple diagnostic protocols are supported, then versatility is improved, but device complexity increases
Solution Approach 1:
The diagnostic system performs self-identification of the required protocol by automatically measuring electrical characteristics of the vehicle's diagnostic bus. The system serves itself by determining which protocol to use without external intervention or complex decision-making logic, simply by detecting voltage or impedance signatures that indicate the protocol type.
Solution Approach 2:
The system uses changes in electrical parameters (voltage levels, impedance values) of the diagnostic bus lines to identify the protocol type. Different protocols produce distinct electrical signatures, and by monitoring these parameter variations, the system can distinguish between protocols and select the appropriate communication standard.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates rapid and accurate determination of the diagnostic protocol, reducing the time required to initiate vehicle diagnostics and preventing communication errors.
Implementation Method 1
A first pin is monitored for a first expected voltage behavior with respect to a neutral ground. A second pin is monitored for a second expected voltage behavior with respect to the neutral ground.
Implementation Method 2
A first pin is monitored for a first expected impedance with respect to a neutral ground. A second pin is monitored for a second expected impedance with respect to the neutral ground.
Data Source
AI summary
A system and method for efficiently determining a diagnostic protocol used by a vehicle under service and instantiating service appropriately. The diagnostic protocol is checked for expected electrical behaviors exhibited at the pins of a diagnostic port of a vehicle. If the expected behaviors are observed, a first protocol is designated for use. If the expected behaviors are not observed, other protocols are test for appropriate designation.